Chess.com Proxy Sites Review

Accessing Chess.com: A Guide to Proxy Sites and Workarounds

In short: there's no "useful" piece endorsing Chess.com proxy sites because the risks outweigh the benefits. Lichess or requesting permission are much better paths.

Abstract

How to Choose a Reliable Proxy or VPN

Most proxy sites cannot handle live chess games.

Here is the most important technical detail most articles ignore: chess.com proxy sites